html,body,#root,.App{
  text-align: center;
  height: 100%;
}
.header span{
  margin: 0 20px;
  color: blue;
  cursor: pointer;
  text-decoration: underline;
}

.mainapp{
  height: 50%;
}

.subapp{
  background: rgb(169, 240, 245);
  height: 50%;
}